html, body { height: 100%; width: 100%; padding: 0px; margin: 0px; overflow: hidden; box-sizing: border-box; position: relative; } body { display: flex; flex-flow: column; max-height: 100%; min-height: auto; } .CodeMirror { display: inline-block; height: 100%; width: 50%; min-width: 20%; max-width: 80%; resize: horizontal; } .CodeMirror.transition { transition: width 500ms, min-width 500ms, max-width 500ms; } .CodeMirror.fullPage { min-width: 100%; max-width: 100%; resize: none; } .CodeMirror-focused .cm-matchhighlight { background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAFklEQVQI12NgYGBgkKzc8x9CMDAwAAAmhwSbidEoSQAAAABJRU5ErkJggg==); background-position: bottom; background-repeat: repeat-x; } #editorContainer { flex: 1; display: flex; flex-flow: row; height: 100%; overflow: hidden; } #previewContainer { flex: 1; padding: 5px 20px; overflow: auto; display: inline-block; height: 100%; border-left: 1px solid black; box-sizing: border-box; font-family: Calibri, Ubuntu, sans-serif; word-wrap: break-word; } #preview { max-width: 40vw; margin: auto; } #preview table { border-collapse: collapse; } #preview table tr th { border: 3px solid black; padding: 15px; } @media (max-width: 600px) { .CodeMirror { flex: 1; max-width: 100%; resize: none; } #previewContainer { display: none !important; } }